Engineering a notched belt is a balancing act among versatility, tensile cord support, and stress distribution. Precisely formed and spaced notches help evenly distribute stress forces as the belt bends, thereby helping to prevent undercord cracking and extending belt lifestyle.
Like their synchronous belt cousins, v belt china V-belts have undergone tremendous technological development since their invention by John Gates in 1917. New synthetic rubber substances, cover materials, construction strategies, tensile cord advancements, and cross-section profiles have resulted in an often confusing array of V-belts that are extremely application particular and deliver vastly different levels of performance.
Unlike smooth belts, which rely solely on friction and will track and slide off pulleys, V-belts have sidewalls that match corresponding sheave grooves, providing additional surface and greater stability. As belts operate, belt stress applies a wedging push perpendicular to their tops, pushing their sidewalls against the sides of the sheave grooves, which multiplies frictional forces that permit the drive to transmit higher loads. How a V-belt fits into the groove of the sheave while working under tension impacts its performance.
V-belts are manufactured from rubber or synthetic rubber stocks, so they have the flexibility to bend around the sheaves in drive systems. Fabric materials of varied types may cover the stock material to provide a layer of security and reinforcement.
V-belts are manufactured in various industry regular cross-sections, or profiles
The classical V-belt profile dates back to industry standards created in the 1930s. Belts manufactured with this profile come in several sizes (A, B, C, D, Electronic) and lengths, and so are widely used to replace V-belts in older, existing applications.
They are accustomed to replace belts on industrial machinery manufactured in other areas of the world.
All the V-belt types noted over are usually available from manufacturers in “notched” or “cogged” versions. Notches reduce bending tension, permitting the belt to wrap easier around small diameter pulleys and enabling better warmth dissipation. Excessive temperature is a major contributor to premature belt failure.
Wrapped belts have an increased resistance to oils and intense temperatures. They can be utilized as friction clutches during start up.
Raw edge type v-belts are more efficient, generate less heat, allow for smaller pulley diameters, enhance power ratings, and provide longer life.
V-belts look like relatively benign and simple devices. Just measure the top width and circumference, discover another belt with the same dimensions, and slap it on the drive. There’s only one problem: that strategy is about as wrong as you can get.